[I] java.lang.NumberFormatException per each Jmeter's 'Regular Expression Extractor' when match not found [jmeter]

["syampol13 (via GitHub)" <gi...@apache.org>]

syampol13 opened a new issue, #6240:
URL: https://github.com/apache/jmeter/issues/6240

   ### Expected behavior
   
   Exception generation is expensive operation so better to not use it whenever possible.
   Failed 'Regular Expression Extractor' shouldn't generate an exception as in some cases it might result in additional CPU utilization
   
   ### Actual behavior
   
   Failed 'Regular Expression Extractor' generate an exception which in turn may result in additional CPU utilization on high failure rate
   
   ### Steps to reproduce the problem
   
   Test plan attached.
   [NumberFormatException.zip](https://github.com/apache/jmeter/files/14385021/NumberFormatException.zip)
   
   It contains two runtime controllers. 1st run for 120sec with a dummy sample and successful 'Regular Expression Extractor' (match found) and another last for 10sec with the same dummy sample but failed 'Regular Expression Extractor' (match not found).
   Each such match not found generates a java.lang.NumberFormatException. This creates corresponding exception spike with ~7K ops rate and causes extra CPU utilization (in my case it was ~10% user+kernel with 16 logical processors).
   
   As you may see CPU is almost idle when 'Regular Expression Extractor' passed. But as it start failing - large number of NumberFormatException Exception is produced and this increase CPU utilization:
   ![image](https://github.com/apache/jmeter/assets/114644227/eac35efc-38cf-4908-b48c-7d70743e8d8a)
    
   Produced exceptions correlates with the `failed` 'Regular Expression Extractor'
   ![image](https://github.com/apache/jmeter/assets/114644227/b27a84ad-0098-4443-ac10-9dd415d0ab9d)
   
   
   ### JMeter Version
   
   5.6.2
   
   ### Java Version
   
   openjdk 11
   
   ### OS Version
   
   _No response_


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